Two approaches to the introduction of pendent carboxylic acid groups into poly(ether sulfone)/poly(ether ether sulfone) polymers have been investigated. The copolymerization of diphenolic acid (4,4-bis(4- hydroxyphenyl)valeric acid) with the usual monomers gave good results in N-methyl-2-pyrrolidone, using potassium carbonate as base. A second approach via bromination and organopalladium-catalysed introduction of acrylates and allyl alcohols was less clear-cut. Grafting of methyl acrylate onto the chain is successful, but its hydrolysis proved to be difficult. Grafting of allyl alcohol onto methallyl alcohol gave poor yields and complex product mixtures.
Посилання на статтю:
Modified poly(ether sulfone)/poly(ether ether sulfone) polymers: approaches to pendent carboxyl groups / Isabelle C. H. M. Esser* and lan W. Parsons // Polymer. – 1993. – Vol 34. – P. 2836-2844.